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Integrating photovoltaic systems and non-linear loads into electrical distribution networks introduces significant harmonic distortions from power converters, reducing overall power quality. Simulation using ETAP software enables the analysis of these harmonics and helps determine optimal placements for solar installations to minimise network disruption. To address harmonic reduction, a procedure for designing and positioning single tuned passive filters is demonstrated, bringing voltage and current harmonics within acceptable operational standards. Two specific filter design approaches are evaluated, one prioritising power factor correction and another focusing on minimising total installation costs. The entire methodology is validated on an actual residential distribution network section in Egypt, successfully lowering individual and total harmonic distortions to meet the requirements of the national grid code.
As solar adoption grows, the electronic converters used in photovoltaic systems can degrade power quality by introducing electrical distortions. Finding practical and cost-effective methods to filter out these harmonics ensures that clean energy can be added to residential networks without destabilising grid infrastructure, overheating equipment, or failing national operating standards.
This methodology targets distribution network operators, grid engineers, and solar installation planners. Using widely adopted ETAP software to size and locate passive filters under defined cost constraints, it functions as an applied planning method. Validated against an actual residential feeder to meet Egyptian code requirements, the approach is applied and tested, making it directly usable for utility grid impact studies and mitigation planning.
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The study is concerned with the optimal penetration of renewable energy sources and their impacts on power quality case studies into distribution systems. Non-linear loads are the main harmonic sources in a distribution grid while the PV system constitutes power converters which are large generating source of harmonics. Therefore, both nonlinear loads and PV systems have large impact on the power quality of distribution systems. In this paper, the harmonics determined by a photovoltaic system (PV) on a distribution system are analyzed. Also, this paper aims to solve the harmonic reduction problem of distribution system which is fed from the PV system by using a number of single tuned passive filters. The ETAP software is employed to simulate a distribution system that feeds a residential area integrated with PV systems to analyze the impact and the best location of these PV to reduce these harmonics and their effect on the distribution system. Also, this paper deals to allocate the filters at the best location for eliminating the harmonics and their impact on the system. Also, this paper proposes an ETAP procedure for choice the optimal design of single tuned filters that able to reduce the effects of voltage and current harmonic contents to be within the accepted practical limits. Two proposed filter design strategies are presented. The first one considers the power factor correction as the primary objective function while the minimization of total installing costs is considered as a primary objective function in the second strategy. An actual part of residential distribution systems as a real application of Egyptian network is implemented to explain the capability of the proposed procedure to improve the power quality and to reduce the total and individual voltage and current harmonic contents to be within their accepted limits of the Egyptian code.
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DOI: 10.1109/mepcon.2016.7837019
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